informal

I got an informal reception.

each June the group meet for an informal reunion.

an informal agreement between the two companies.

low place: An informal term for a cenote.

an informal gathering of friends; a relaxed, informal manner.

Sometimes formal English and informal English are undistinguished.

an increased articulation between the formal and informal sectors.

the real locus of power is the informal council.

informal conversation between the leaders of two countries

An informal brunch served as a preface to the three-day conference.

The leaders met over informal lunches.

Her speech is informal and filled with colloquialism.

Dress at the party was informal,with no neckties or fancy dresses.

speaking in an informal register; writing in a scientific register.

The audience behaved indecorously as if the concert were an informal dress rehearsal.